阅读理解。 What would you do if a stranger gave you some medicine and it would keep you slim or help you do well in exams? Would you take it? Students at Shenzhen Luohu Foreign Language Middle School have learned to keep themselves safe by saying 'no'. In fact, what those strangers want to give them are drugs (毒品). Drugs are dangerous to your health! 'Because teens don't know much about drugs, they might want to try them,' said Zhang Dongsheng, the director of Shenzhen Drug Control Office. Now, many schools arrange courses or organize some activities to help students know about drugs. Liang, 16, was a good student before trying drugs. One day, some old friends told him it would be fun. After taking drugs only once, he found it very hard to stop. Liang began to spend all his time and money on drugs. Soon, he stopped going to school and started stealing. In the end, he was put in prison. In China, taking drugs is becoming a big problem for teens. According to a survey, about one million people in China were using illegal drugs last year, and 72% of them were young people. Worse still, there are about10,000 drug users under 16 now. Zhang has some good advice on staying clean. He said, 'Drugs are dangerous. Never try them, even if you're curious! It is the most important for you to keep safe and healthy.' 1. According to this passage, drugs can ______. [     ] A. do harm to your health B. help you do well in exams C. keep you slim and lovely D. make you stay well 2. Teens wants to try drugs because ______. [     ] A. they are 18 years old B. they aren't curious about drugs C. they have enough money D. they don't know about the harm of drugs 3. From Liang's story, we can know that it's ______ to give up drugs even if one tries only once. [     ] A. easy B. hard C. foolish D. possible 4. According to a survey, about ______ young people in China were using illegal drugs last year. [     ] A. 1,000,000 B. 100,000 C. 10,000 D. 720,000 5. What does the phrase 'staying clean' here mean? [     ] A. Being clean. B. Keeping clothes clean. C. Staying away from drugs. D. Wearing clean clothes.